# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from .interval_trigger import IntervalTrigger


def never_fail_trigger(trainer):
    return False


def get_trigger(trigger):
    if trigger is None:
        return never_fail_trigger
    if callable(trigger):
        return trigger
    else:
        trigger = IntervalTrigger(*trigger)
        return trigger
